The man, identified as Muhaydin Mire of Leytonstone in east London, was stunned with a Taser and arrested after he allegedly stabbed at least two people at Leytonstone Underground Station.

None of the victims suffered life-threatening injuries, but one was initially reported in serious condition.

Commander Richard Walton, head of the Metropolitan Police counterterrorism task force, said in a statement Sunday that London remains under a "severe" terrorism threat and more attacks are "highly likely."

While the suspect was being arrested, a bystander shouted, "You ain't no Muslim, bruv," according to video of the incident that quickly went viral, spawning a Twitter hashtag that became a worldwide icon for preaching peace.